Improve docs

Author: rpanackal

orchestration/src/main/java/com/sap/ai/sdk/orchestration/AzureModerationPolicy.java

@@ -9,9 +9,16 @@
 @Getter
 @AllArgsConstructor
 public enum AzureModerationPolicy {
+  /** Strict moderation policy. Only safe content is allowed. */
   ALLOW_SAFE(AzureThreshold.NUMBER_0),
+
+  /** Moderate moderation policy. Safe and low-risk content is allowed. */
   ALLOW_SAFE_LOW(AzureThreshold.NUMBER_2),
+
+  /** Relaxed moderation policy. Safe, low-risk, and medium-risk content is allowed. */
   ALLOW_SAFE_LOW_MEDIUM(AzureThreshold.NUMBER_4),
+
+  /** No moderation policy. All content is allowed. */
   ALLOW_ALL(AzureThreshold.NUMBER_6);
 
   @Nonnull final AzureThreshold azureThreshold;

orchestration/src/main/java/com/sap/ai/sdk/orchestration/ContentFilter.java

@@ -1,6 +1,7 @@
 package com.sap.ai.sdk.orchestration;
 
 import com.sap.ai.sdk.orchestration.client.model.FilterConfig;
+import javax.annotation.Nonnull;
 
 /**
  * Interface representing convenience wrappers of serializable content filter that defines
@@ -14,5 +15,6 @@ public interface ContentFilter {
    *
    * @return the corresponding {@code FilterConfig} object.
    */
+  @Nonnull
   FilterConfig createConfig();
 }